Boston's central Artery/Tunnel Project, "The Big Dig," began as a brilliant feat of engineering outlined on the back of an envelope by Frederick Salvucci, Governor Dukakis's secretary of transportation. Digging is a celebration of the men and women who did the work - not the politicians or businesspeople, but the sandhogs, laborers, carpenters, electricians, plumbers, iron workers, pile drivers, surveyors, and operating engineers who sweated and bled together underground for over ten years. In 1997 documentary photographer Michael Hintlian had a "an instinct" to begin visiting job sites and recording the work. Time and again, he was thrown off a site, only to move two blocks down the street and start shooting again. Eventually, workers and contractors alike developed a grudging respect for his perseverance and sense of purpose. Seven years in the making, Digging is an eloquent tribute not only to Boston's working men and women but to laborers everywhere.